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Charging Modern Batteries in High Ambient Temperatures.

CHJ

CHJ

Nordic Pine
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During the UK's short excursing into High Air Temps and relatively high humidity recently, I had occasion to place several small gardening appliance batteries on charge.
Now even at 'normal' UK temps, these batteries often have to spend some time cooling down before the chargers will deem it safe to start inputting energy.

In a couple of instances in said heat wave I had the impression charging wasn't going to happen until I took deliberately steps to speed up the cooling of the batteries and charger.

Has anyone who has to use these devices in a work environment seen problems with on site charging from power packs etc. on such days?

It also started me thinking about Power Banks in Lofts etc. are we getting into the realms of spending a significant amount of energy cooling the battery so that we can use it or recharge it?
 
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I bought a new AK30 battery for my Stihl mower last week and left it in my truck for a few hours before putting it in the charger. The status LED on the battery immediately turned red and it would not charge. I took it back to my local Stihl dealer where I bought it in case it was a defective battery. The store owner recommended I put it in the refrigerator for 30 minutes and let it cool down before putting it back in the charger because it was definitely too warm. This worked and I've mowed my lawn twice since without charging.

I normally keep batteries to my lawn machines and tools in the basement until needed.
 
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I think all of my battery chargers have in built fans these days, I certainly hear the fans kicking in if I’ve drained a battery quickly & it’s hot to the touch when I fit it in the charger.
 
Mike said:
I bought a new AK30 battery for my Stihl mower last week and left it in my truck for a few hours before putting it in the charger. The status LED on the battery immediately turned red and it would not charge. I took it back to my local Stihl dealer where I bought it in case it was a defective battery. The store owner recommended I put it in the refrigerator for 30 minutes and let it cool down before putting it back in the charger because it was definitely too warm. This worked and I've mowed my lawn twice since without charging.

I normally keep batteries to my lawn machines and tools in the basement until needed.
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Interesting Mike thanks for sharing. i have just purchased my first battery powered garden tool; a Stihl hedge trimmer with Ak10 and Ak20 batteries. These would normally be kept in the barn which does get very warm.
 
I do wonder about all those big lithium batteries being installed in lofts paired with solar panels. It gets pretty hot up in our loft.
 
I often see " high temperature - remove device from charger " with the android devices we use at work.
I think its the lithium battery fire hazard at play.
In a previous life I had to keep nicad batteries and charger in the shade for as long as possible in heatwaves.Niether would function above a certain ambient temp.
 
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So it seems both high and low temperatures reduce the charging ability. During the winter if the batteries are cold I need to put them directly on top of the windshield heating vent in my truck.
 
I keep the spare battery for my Festool cordless drill on a ceramic tiled floor in the downstairs loo which is fairly cool. Likewise, spare bottles of glue (TB3 etc) are kept in the fridge at 2degC - Rob
 
Woodbloke said:
I keep the spare battery for my Festool cordless drill on a ceramic tiled floor in the downstairs loo which is fairly cool. Likewise, spare bottles of glue (TB3 etc) are kept in the fridge at 2degC - Rob
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Just don't confuse the glue for mayonnaise, Rob :ROFLMAO:
 
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